Mulligans
General Mulligans
Any of these 6 cards you want to keep kind of no matter what. Voidwalker into Genius then followed by the Thrasher or a Coin Recruiter+ Lackey is the ultimate curve for this deck.
The Vulture is also a good card to have, but typically not good enough for the opening hand.
Lackeys and Zoolock unite to create an aggro/midrange deck that just keeps producing a lot of tempo and value.